It is not a LANGUAGE, it’s an SDK : According to the official website of flutter: “Flutter is Google’s mobile app SDK for crafting high-quality native interfaces on iOS and Android in record time.
Is Flutter a SDK?
Flutter is Google’s free, open-source software development kit (SDK) for cross-platform mobile application development . Using a single platform-agnostic codebase, Flutter helps developers build high-performance, scalable applications with attractive and functional user interfaces for Android or IOS.